Press the DPI switch button once and move the mouse. If the cursor speed changes, you’ve found the cause. Cycle through the ...

Move by Division, meanwhile, divides your screen up into sections, and each press of your key command will hop your cursor over from space to space; Move to Edge/Corner, Move to Other Display, and ...

If it's a wired mouse, wiggle the wire where it attaches to the mouse and where it attaches to the computer; if that makes the cursor jump on your screen, it's time for a new mouse.